SPECTROGRAPHY, August 2006
Date : August 2006
Location : Pises Observatory
Intrument : Intes 180mm + Modified Losmandy G-11 (optique et vision)
Guiding camera : Vesta pro
Imaging camera : SBIG ST7
Tracking system : MCMT II
Spectrograph : Lhires III, using 2400 lines per mm grating, slit width estimated to 25 to 30 µm (3").
The acquisition and tracking was achieved using PRISM v6 software, as well the spectra were all processed and calibrated using this software.See here (PRISM's newletters). All spectra are made of 60s single exposures
The observers (P.Roblin and myself)
ARCTURUS
This is a K1 type star (redhish an rather old), this the spectra from 652 nm to 661 nm, Halpha is absorbed (1260s exposure time).
ALTAIR
A7V blue star, showing a wide halpha absorption band (Only 120s).
Here due to failure from neon lamp, spectral calibration was not performed. Atmospheric lines can be used instead.
This is a peculiar B star, with an absorption line nearby a strong Halpha line (5000sec).
BSC8297 (Cygni) said as "RV Cyg"
This is a mag 6 C6 type star, it has a deep red color and is an old star, called as carbon stars. B-V magnitude index is 2.5 !
The spectra is pretty unusual !! Very convenient for testing spectrograph resolution (1300s exposure time).
Here due to failure from neon lamp (camera alignement was also changed), spectral calibration was not performed.
Gamma CAS
Gamma Cassiopea is a famous BE star, Mag 2.47 featuring a strong H-alpha emission line that changes over the time. 2800s exposure
BSC 8146 (Cygni)
This a magnitude 4.43 Be Star (600s exposure time)
Here due to failure from neon lamp, spectral calibration was not performed. Atmospheric lines can be used instead.
DELTA CASS
A mag2.7 A5 type star, a spectra very close to Altair, 1900s exposure time.
64 Cygni
This is a G8 star, magnitude 3.2. 600s exposure time. As a G8 star, this one is very close to the SUN physicaly speaking (more or less same spectra lines)
Here (again) due to failure from neon lamp, spectral calibration was not performed. Atmospheric lines can be used instead.
CYGNI stars map
